When the father or mother of a minor names a person as guardian of the estate of that minor in a will, the person named shall have preference in appointment over the person selected by the minor. A person named in that will as guardian of the person of that minor shall have no preference in appointment over the person selected by the minor, but in that event the probate court may appoint the person named in the will, the person selected by the minor, or some other person.
Whenever a testamentary guardian is appointed, the testamentary guardian's duties, powers, and liabilities in all other respects shall be governed by the law regulating guardians not appointed by will.
R.C. § 2111.12